Erroneous reading of information in chipless RFID tags

Influence of Mutual Coupling on Stability of RCS Response in Chipless RFID

“…Figure 1a shows the original U-folded dipole (UD) that has the outer size 20 × 2.5 mm with the strip width 1 mm and the gap size 0.5 mm in accordance with Reference [1]. The tapered U-folded dipole (T-UD) of the same outer size is depicted in Figure 1b This paper employs a simple equivalent circuit model (ECM) (originally proposed in [11]) of the RFID tag composed of an array of U-folded dipoles [8,9] to predict and study its RCS response. RCS at each frequency is related to currents flowing in individual coupled resonant circuits representing original tag scatterers.…”

“…The width of arms is 1 mm. This paper employs a simple equivalent circuit model (ECM) (originally proposed in [11]) of the RFID tag composed of an array of U-folded dipoles [8,9] to predict and study its RCS response. RCS at each frequency is related to currents flowing in individual coupled resonant circuits representing original tag scatterers.…”

“…Tags with rearranged positions of resonators are shown in Figure 2c Figure 2b shows the layout of the uni-planar RFID chipless tag composed of an array of 20 T-UDs presented in Reference [8]. The equivalent circuit of the ith single resonator is composed of a series resonant circuit L i , C i , and R i (see Figure 3) [11]. This circuit is fed by the source of voltage V i that corresponds to the incident electric field E irradiating the tag.…”

A Novel Detection Technique for a Chipless RFID System Using Quantile Regression

“…Whereas, References [7,8] focus on low manufacturing cost, compactness, flexibility, and efficient bandwidth utilization for IoT based sensing applications. In Reference [3,4,[9][10][11][12][13][14][15][16][17][18][19][20], various shapes of resonators are proposed to increase the compactness and flexibility. Nevertheless, some researchers [21][22][23][24][25][26][27][28] have discussed various ways to increase the range of the RFID.…”